Transfer your training data quickly and easily with the Polar IR USB 2.0 adapter. You'll be able to download data from your HRM wirelessly to your PC via infrared signal so you can take an in-depth look at your stats. Store and analyze critical performance data and maintain a detailed training log. The IR interface works with the Polar F55, AXN500, AXN700, RS400, RS800, S610i, S710i,S720i S810i, S625X, S725, and S725X.Transfers data from your Polar heart rate monitor to your PC for analysisCommunicates with PCs via either IR (infrared) or USB 2.0 portWorks with the Polar S625X, S720i, S725 and other Polar IR downloadable unitsStore and analyze critical performance data and maintain a detailed training log